Row dense in grid-auto-flow

In the example of grid-auto-flow:
When I see the ‘grid-auto-flow’ property in styling in the Inspector pane after selecting row and dense is checked, I see that the value of ‘grid-auto-flow’ is ‘dense’ instead of ‘row dense’, and also when console logging ‘grid.style.gridAutoFlow’, the console returns ‘dense’ instead of ‘row dense’.